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Old 01 December 2007, 13:53   #11
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I ended up doing it slightly differently. I've built up the transom with a piece of oak (at least 60 years old). It's going to be sikaflexed on and then a sheet of s/steel is going to be folded round.
That really hasn't got a hope in hell of working!
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Old 01 December 2007, 14:26   #12
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IMHO that piece of oak should have been an inch or so bigger and machined along with the transom to form a lap joint. Then you could epoxy the joint, glass over the whole thing then wrap it in stainless.

I may have the exact same problem on my next project only it will involve twin 250hp O/B's. Frankly I'm sh***ing myself. I've already lost one 150hp O/B off the back at WOT, a somewhat unpleasant experience I hope not to repeat!
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Old 01 December 2007, 14:39   #13
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IMHO that piece of oak should have been an inch or so bigger and machined along with the transom to form a lap joint. Then you could epoxy the joint, glass over the whole thing then wrap it in stainless.

I may have the exact same problem on my next project only it will involve twin 250hp O/B's. Frankly I'm sh***ing myself. I've already lost one 150hp O/B off the back at WOT, a somewhat unpleasant experience I hope not to repeat!

Had it done on a Revenger San marino with twin 225. Launched on the thames made it to France then in a force 5 / 6 it started to break.

So yes your right to be sh***ing yourself
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Old 01 December 2007, 17:26   #14
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a piece of oak (at least 60 years old).
duzz yorr muvver noe yoov nikt de dore ofn hir anteek looey de forteenth ritin tabul
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Old 03 December 2007, 05:57   #15
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If that bit of Oak wants to move (and it probably will!!) it is going to & you can not stop it! Marine ply is the way to go!
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Old 03 December 2007, 13:16   #16
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Marine ply is the way to go!
Buying the correct length motor is "the way to go". Failing that, a proper transom mod, costing a couple of days labour is the alternative!
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Old 04 December 2007, 04:39   #17
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Don't Panic

You've had me panicing all weekend and I haven't been able to do anything about it.

It's a pro who's doing it. I phoned him this morning to explain what I understood he was going to do and he laughed and told that it would not stand a chance in hell of working.

What he's going to do is glue the wood onto the transom with some special resin glue, he's then going to screw the wood into the transom with some big stainless screws. The 6mm sheet of stainless steel is going to be folded around the transom and then bolted on. The bottom bolts of the engine are going to be bolted to the original part of the transom and the top ones through the wood bit.

All this for a 60hp Yamaha. I have confidence in this guy (I have to as I know stuff all). He prides his work. Please tell me that that's enough.
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Old 04 December 2007, 04:49   #18
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Pablo

With the 6mm SS either side it should be enough for thye 60HP you have.

thats just my opinion of course.

Nasher.
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Old 04 December 2007, 04:57   #19
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Thanks, i'm relieved. I'll be happy when it's in the water and i'm testing.
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Old 04 December 2007, 06:06   #20
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I do have to ask here - add one lump of oak to a couple of square metres of 6mm stainless - that's a LOT of extra weight to add. Surely a siezed short shaft engine for a leg swap would provide you with a far cheaper and lighter alternative?
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